D:\redmine-2.3.3>bundle install --without development test rmagick
Fetching source index from https://rubygems.org/Could not verify the SSL certificate for https://rubygems.org/.
There is a chance you are experiencing a man-in-the-middle attack, but most
likely your system doesn't have the CA certificates needed for verification

information about OpenSSL certificates, see bit.ly/ruby-ssl. To connect wit
using SSL, edit your Gemfile sources and change 'https' to 'http'.

Please update your PATH to include build tools or download the DevKit
from 'http://rubyinstaller.org/downloads' and follow the instructions
at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'

Q1.無法連外網，要使用 HTTP_PROXY ，怎麼做?

Fetching source index from https://rubygems.org/Could not verify the SSL certificate for https://rubygems.org/.
There is a chance you are experiencing a man-in-the-middle attack, but most
likely your system doesn't have the CA certificates needed for verification

information about OpenSSL certificates, see bit.ly/ruby-ssl. To connect wit
using SSL, edit your Gemfile sources and change 'https' to 'http'.